AISI P20 Steel Round Bar Sheet Plate, DIN 1.2311, SCM4
P20 steel round bar sheet plate has many excellent properties. In the pre-hardened status, the mold can be processed without any heat treatment. Which cut down the running period and improves efficiency. After it has been processed through the forged, 1.2311 steel becomes dense. Then it can pass 100% ultrasonic test. And after the test, there will be no pores left and no defect. And it also is called DIN 1.2311 and SCM4 steel. P20 tool steel chemical composition and more information as below.
| P20 Steel Round Bar Sheet Plate Supply Range | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Specification | Surface | |||||||||||||||||
| Round Bar | Dia: 20-1000mm; Other specifications can be customized. | Black, Rough Machined, Turned or as per given requirements. | |||||||||||||||||
| Sheet/Plate/Slab | Thickness: 130-650mm; Width: 205-2200mm; Other specifications can be customized. | Black, Rough Machined, Turned or as per given requirements. | |||||||||||||||||
| Block | Thickness: 130-650mm; Width: 205-810mm; Other specifications can be customized. | Black, Rough Machined, Turned or as per given requirements. | |||||||||||||||||
P20 Steel Grade Equivalent Chart
| Country | USA | Germany/UK/France | ISO |
|---|---|---|---|
| Standard | ASTM A681-08 Alloy Tool Steel | EN ISO 4957: 1999 Tool Steel | ISO 4957: 1999 Tool Steel |
| Grades | P20 | 35CrMo7/1.2311 | 35CrMo7 |
Delivery condition: pre-hardened (28-34HRC)
with black or bright surface.
Quality control: 100% UT (Ultrasonic Testing),
UT Standard is SEP 1921-84 C/c.
P20 Steel Chemical Composition
| STAND | C(%) | Mn(%) | P(%) | S(%) | Si(%) | Cr(%) | Mo(%) |
|---|---|---|---|---|---|---|---|
| ASTM A681-08 Alloy Tool Steel | 0.28-0.40 | 0.60-1.00 | ≤0.030 | ≤0.030 | 0.20-0.80 | 1.40-2.00 | 0.30-0.55 |
| EN ISO 4957: 1999 Tool Steel | 0.30-0.40 | 0.60-1.00 | - | - | 0.30-0.70 | 1.50-2.00 | 0.35-0.55 |
| ISO 4957: 1999 Tool Steel | 0.30-0.40 | 0.60-1.00 | - | - | 0.30-0.70 | 1.50-2.00 | 0.35-0.55 |
1.2311 Steel Physical Properties
| Density | Specific Gravity | Modulus of Elasticity | Thermal Conductivity | Machinability |
|---|---|---|---|---|
| 0.284 lb/in3(7861 kg/m3) | 7.86 | 30 x 106 psi(207 GPa) | 24 Btu/ft/hr/°F 41.5 W/m/°K | 60-65% of a 1% carbon steel |
P20 Steel Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Brinell(typical) | 300 | 33 |
| Hardness, Rockwell C(typical) | 30 | 30 |
| Tensile strength, ultimate | 965-1030 MPa | 140000-150000 psi |
| Tensile strength, yield | 827-862 MPa | 120000-125000 psi |
| Elongation at break(in 50 mm (2")) | 20.0% | 20.0% |
| Compressive strength | 862 MPa | 125000 psi |
| Charpy impact(V-Notch) | 27.1-33.9 J | 20.0-25.0 ft-lb |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
| Elastic modulus | 190-210 GPa | 27557-30457 ksi |
Hot Sale Products
P20 Steel Application
P20 steel is used to make thermoplastic molds, extrusion dies, injection molds and die casting dies. And can also be used to make main components of heavy-duty mold. In addition, it also be used to produce cold structural parts, TV cases, washing machines, inner casings of refrigerator and buckets. Of course, 1.2311 steel can also be used to make bumper dies for automobiles or structural components of cars. 1.2311 steel has very good hardness and plasticity. So it can be used to make a variety of molds.
The Method of Use
1.2311 steel has been pre-hardened to 285-330HB(30-36HRC), which can be used directly for mold making and process. It also has the characteristics of good dimensional stability. Just Pre-hardened steel can meet the needs of the industry. The die life can reach 50W mode times.
P20 Steel Round Bar Sheet Plate Heat Treatment
Stress Relieving
Preheating: Because mold steel 1.2311 steel plate is sold in a pre-hardened condition, hardening heat treatment is not necessary. After machining and intermittently during service, the steel must be thermally stress relieved by heating to 900ºF (482ºC), equalizing and holding for one hour per inch (25.4mm) of thickness, and cooling in air to ambient temperature.
In those rare circumstances where the AISI steel P20 must be re-hardened, the steel must first be annealed prior to hardening.
Hardening
Critical Temperature: Ac1: 1405ºF (763ºC)
Preheating of P20 metal: Heat at a rate not exceeding 400ºF per hour (222ºC per hour) to 1150-1250ºF (621-677ºC) and equalize.
Austenitizing (High Heat)
Heat rapidly from the preheat to 1550ºF (843°C). Soak for 30 minutes for first inch (25.4mm) of thickness, plus 15 minutes for each additional inch (25.4mm).
Quenching
Pressurized gas, or interrupted oil to 150-125ºF (66-51ºC).
For oil, quench until black, at about 900°F (482°C), then cool in still air to 150-125°F (66-51°C).
Tempering
1.2311 tool steels are tempered at 482-593°C (900 to 1100°F) for a Rockwell C hardness of 37 to 28.
Annealing
Annealing for AISI P20 tool steels takes place at 760-788°C (1400 to 1450°F) and then the steels are cooled slowly in the furnace at a temperature less than 4°C (40°F) per hour.
1.2311 Tool Steel Forging
1.2311 steel plate and round bars materials are forged at 1093°C (2000°F) down to 899°C (1650°F). Forging below 871°C (1600°F) is not recommended for these steels P20 material.
Notice
We have our own cutting and processing equipment. Specifications can be cut and customized according to your requirements.
We are professional special steel stockist and supplier with a high-quality stand for many years. Please contact us for any request of P20/1.2311 steels materials. Songshun Steel always with you.
About SongShun Steel
SongShun Steel specialized in steel as a professional special steel supplier, and also can give you technical advice and support for your business base on our professional technical knowledge.
Our Advantage
Manufacturing
With 7000 tons of hydraulic forging press, electric slag furnace and other high-end production equipment, we produce a great variety of steels with the best quality in China.
Testing
In order to control the quality, we have complete testing methods to make sure satisfy the customer needs, including Chemical Analysis, Ultrasonic Test and so on.
Massive Stock
We keep a mass stock are over 20000 tons for various steel type, including steel round bar, steel sheet, alloy steel, carbon steel, stainless steel, mold steel, steel coil and etc.
Customized Service
With a professional steel engineers team, we provide customized service according to your project drawing, also provide professional project experience for your special project, such as materials, processing conditions and etc.
World Wide Delivery
For container shipment, standard packing and bundle round bar and flat bar would be applied. It is necessary to fasten & reinforcement would be done to ensure the safety and better unloading at the destination port.
For less than container shipment, wooden box package would be applied for different size materials. For milled or grounded materials, the anti-rust oil would be needed to ensure the surface condition, within the wooden box.
